Oil-feed control for oil burners



' 1630,265 May 31 w27" A. P. HoLDEN E1- AL OIL FEED CONTROL 'FOR OILBURNERS Filed Sept23. 1926 {Sheets-Sheet l 5 44 z? o O 5 y 4 7 M 5 55'26T .6 f 6 r n? 7 zsf. Sb-f T QJ Z z @L i 4 f 6 51 momo 16 7:? zo

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A. P. HOLDEN ET AL OIL FEED CONTROL FOR OIL BURNERS Filed Sepp. 23, 1926Patented' May 31, 1927.

UNITED STATES PATENT OFFICE.

ARTE-UR P. HOLDEN, PHILIP MORGAN, AND SAMUEL ROLFIE! WILLIAMS, 0FTORONTO,

' i ONTARIO, CANADA.

i OIL-FEED CONTROL FOR OIL BRNERS.

Application led September 23, 1926. Serial No. 137,358.

The principal objects of the invention are to eliminate the possibilityof siphonin oil from the oil container in the event o an unforseenaccident breaking the oil line from the supply to the burner, and toobviate the necessity ofreturning surplus oil discharged from the pumpback to the reservoir. i

A further object isto provide an apparatus which will pump from thecontainer only the amount of oil required for use. Y

The principal feature of the invention consists in the novelconstruction and arrangement of parts, whereby the supply of oil to theoil pump feeding the burner and lubricating the mechanism is controlledby a float controlled valve interposed in the feed line to the pump.

A further important feature consists in the novel construction ofthemeans for regulating the quantity of oil fed to the burner and in thenovel construction of the strainer for straining the oil flowing to thepump.

'In the accompanying drawings, Figure 1 is a plan view of an assembly ofthe present structure of oil feed control.

Figure 2 is a vertical longitudinal sectional view through the line 2-2of Figure 1. A

Figure 3 is an enlarged detail sectional elevational view showing thevalve and toggle mechanism in different positions.

Figure 4 is a vertical longitudinal sectional view through the line 4.-4of Figure 1. l

Figure 5 is a vertical lon itudinal sectional view on the line 5--5 oFigure 1 on an enlarged scale.

Figure 6 is an enlarged vertical sectional detail on the line 6-'6 ofFigure 1..

Fi re 7 is an enlar ed vertical sectional detail on the line 7 of Figure1.

Figure 8 is an enlarged horizontal sec- Y tion through the line 8-.-8 oflFigure 5.

In the' operation of oil burners used in household heating whereintermittent service is required, many diiculties are met with. that arenot found where a constant demand is required. Further, the insur,

ance requirements in respect to the use of oil burners are such as aretodemand that if an apparatus fails in its function, it must fail safe,that is, itmust fail so that an over lus of oil cannot be dischargedinto the urnace to create an explosion.

The present invention has beenl devised to meet this requirementA andyin the arrangement herein shown the tray 1 of the stand upon which theair pump and its operating motor are mounted, has secured at one sidethereof a casing 2 which is of substantially rectangular form having anopening 3 in one side thereof which communicates with a passage 4 in thetray structure which leads to the inlet of the rotary blower 5. f

At one end of the casing 2 is arranged a (ianged extension 6 which hasacentrally arranged cylindrical apron 7 fwhich is surrounded at the topby a circular seat 8 and a cup 9 having its upper edge fitted in aground joint to said seat, extends around and below the apron.

A bolt 10 extends throu h a central opening downwardly axially o the aron 7 and engages a threaded hole 11 in a oss in the bottom of the cupand holds the cup tightly in lace. y

strainer basket 12 is fitted between the bottom of the cup 9 and a seat13 at the inner side of the apron 7.

A passage 14 which is connected by a suitable pipe to the oil supplytank leads to the space between the apron and the strainer basket. i

A passage 15 leads upwardl from above the seat 13 to the pipe `16 whichconnects with a passage 17 formed in the top of the casing 2.

A plurality of ball checks 18, each seating individually are arrangedinthe passage ll5 to ensure against any return How of oil. 4

The strainer, cup and apron formed as shown effectively separate anysediment from the oil and retain itA so that it may be easily removedand the cup 9 which provides an air lock above the bottom of the apronhas a ca acity suiiicient to hold all the oil centaine at any one timein the device aftery the pump has been stopped, consequently thestrainer may be very easily cleaned without any oil being spilledaround. The provision of the air lock prevents any leakage of oilthrough the ground 'joint Aat the top of the cup.

rlhe passage 17 in the top of the casing connects at its inner endthrough a vertical passage 19 with a horizontal passage 20 and a ballcheck valve 21 is arranged at the top of the passage 19, allowing theinflow andchecking return.

The passage, connects with a chamber l 22 having a vertical orifice 23leading from the bottomthereof closed by a ball check 24. Thel orifice23 is enlarged midway of its depth and connects with a horizontalpassjage 25 which extends at right angles therefrom and. is connected toa pipe 26 which leads to the intake of the oil pump 27.

The lower end of the vertical orifice 23 is enlarged and the shoulder 28therein forms a seat for a tapered valve 29 which is movable verticallytherein and has 4a reduced extension finger 30 which is adapted toproject through the upper end of the orifice 23 to engage and lift theball check 24 from its seat upon the tapered portion thereof being movedinto engagementwith the shoulder 28. y y

A bracket l31 having a collar clamped to the lower end of the tubularextension surof which is pivoted on the lower end of the screw 34 andthe other of which is pivotally connected to a link 38 and the other endof saidv link is pivotally connected to the free end of'therocker bar32.

The movement of the float up or down i .I on the pivot on the end of thescrew 34 upwardly upon the link 38 or depresses ity to correspondinglymove the valve 29 downwardly away from the seat 2.8 openingcommunication between the interior ofthe casing 2 and the horizontalpassage 25 leading to the oil pump and simultaneously closing 'the upperend of the vertical orifice by allowing the ball check to dro-p to itsseat or moving the valve 29 upwardly to close against the seat 28 andshut ofi' communication between the oil ump and the interior of thecasing 2 but li ting the ball check 24 from its seat, therebyestablishing communication between the pump and the oil supply throughthe strainer. This piece of mechanism forms the principal part of theinvention.

It will be seen that as the fioat moves downwardly from the' positionillustrated in the drawings, the link 38 Will be depressed I .until thecentre of the pivotal connection betweenthe jaw end of the arm 36 and`thel link is in line between the pivot on the screw 34 and the pivotalconnection of the linl: with the rocker bar 32 and as the floatcontinues to drop the toggle formed by the link and float arm passes thedead centre and then lifts upwardly on the link.

stood that when oil Hows' into the casing 2 to raise the ioat to acertain predetermined level the feed to the pump will be automaticallytransferred from the oil line direct to the interior of the casing bythe closing of the valve 24 and the opening of the tapered valve 29. Thepump then draws its supply from the casing and the float immediatelylowers and as it lowers the toggle action raises the valve 29 graduallyshutting off the suction therefrom but automatically .opening the oilline from the main supply. If fjor any reason the main supply shouldfail and the float continue to fall, it -will automatically transfervthe suction end of the pump to the casing and if the failure continues,the supply will of course be exhausted from lthe casing 2 and eventuallythe burner will cease to function.

Upon the re-establishment of the main supply, the oil will first flow tothe chamber 2 until it rises therein to operate the float. It will bereadily understood that if for any cause the fioat should fail, the oilwill be eX- hausted from the float chamber and the v7o From thisdescription 1t will be under` burner will cease functioning,consequently the device fails safe under all conditions and thesiphoning of the oil from the main supply is rendered impossible.

The fiow of oil from the discharge of the .pump is directed into achamber 39. With-- in this chamber and supported in the gland 40lsecured in the top thereof is a fixed tubular spindle 41' which extendsdown through the chamber 39 into a chamber 42.

The spindle is provided with a hole 43 intermediate of its lengththrough which the oil may flow from the chamber'39 and passing throughthe spindle it iows to the chamber 42,' from whence it. flows throughthe.

pipe 44 to the burner nozzle.

The ow of the oil through the hole 43 is governed by a threaded spindle45 within the fixed spindle 41.

The spindle 45 may within the spindle 41 to accurately regulate the sizeof the opening through the hole`43.

A sleeve-46 rotatably encircles the spindle 41 and is driven from thespindle of the oil pump.` This sleeve extends over the hole 43 and iscut away to formv a plurality of ports 47, which as the' sleeve rotatescontinuously pass over the hole 43 and keep the opening clear of anyaccumulation of dirt by breaking up any thick oil that might have anytendency to clog thel passage.

`The oil flowing to the chamber 39 from the pump, which cannot assthrough the lfeed to the burner, lifts t e spring loaded 'its beadjusted vertically valve 48 in the chamber 49 communicating with thechamber 39 and ows through a pipe 50 to the top of the'regulated sightfeed oilei` 51 and the oil which is not allowed to pass through theoiler flows into a recess 52 in the top of the extension 53 on the topof the cover of the casing 2 and is directed therefrom into the interiorof the casing 2.

The lower end of the oiler connectswith a passage 54 which leads to thebottom of a recess 55 in the other side of the extension 53 of thecasing `top and this passage is connected with the passage 4 in the tray1 to the intake of the blower by the opening 3.

A plurality of air holes 56 are arranged in the side wall of the recess55 and air is drawn through these holes into the passage by the suctionof the blower and this together with the oil fed into this passage fromthe oiler is drawn into the blower, the oil serving to lubricate same.

The upper end of the recess 55 connects witha chamber 57 in theextension 53 which also connects with the recess 52 from the top of theoiler so that any fumes or vapor arising from the oil within the casing2 will be drawn off and directed to the blower which feeds air to theburner nozzle.

It is an important feature in devices of this nature that they be keptfree of any accumulation of oil therearound for safety purposes and thetray l is provided with a depression 58 Fig. 4, which communicates withthe duct 59 connecting with the air duct from the chamber 55 so that anyoil dripping from the oil pump or its surrounding lparts will be drawninto the machine and disposed of.

The device is very compact and extremely simple in its operation but itforms a very important advancement in the art of burning oil.

In practice the floatin the chamber remains in a position of balance,the pump taking its supply alternately from the main supply or from thecasing and there is no return of oil to the main reservoir.

The supply pipe from the main reservoir may be carried over head outvofall danger from breakage and the-whole apparatus is rendered extremelysafe and' also very positive in its function of supplying oil to theburner in a regulated quantity and the features of adjustment are veryaccurate, consequently the minimum amount of oil to produce the desiredresults is used and the supply being so uniformly regulated the fireproduced will bey very steady. l

What we claim as our invention is 1. In an oil feed control for oilburners,

` the combination with an oil supply anda pump and means for regulatingthe -fiow of oil from the (pump to the burner, of av reservoir adapte toreceive the excess dis- `the combination with an oil supply and chargefrom the pump, an oil passage connected with the main supply and leadingto the intake of the oil pump, a free check valve in said passageadapted to close the inflow of oil to the pump, a passage connected withthe passage to the pump and leading into the reservoir, a valve separatefrom saidcheck valve adapted to close the passage from the reservoir tothe pump and concurrently open the check valve and adapted to permit theclosing of the check valve upon being opened, and float controlled meansfor operating the latter valve.

2. I n an oil feed control for oil burners,

the combination with an oil supply and a.

pump and means for regulating the flow of oil from the pump to theburner, of a reservoir adapted to receive the excess discharge from thepump, an oil passage connected with the main supply and leading to theintake of the oil-pump, a check valve in said passage adapted to closethe1 inflow of oil to the pump, a passage connected with the passage tothe pump' and leading into the reservoir, a valve adapted to close thepassage from the reservoir to the pump and concurrently open the checkvalve and adapted to close the check valve upon being opened, a ioatpivotally mounted within said reservoir, and a toggle connection betweensaid fioat and said latter valve adapted to' open the valve to thereservoir upon the raising of the oat or upon anexcess depressionthereof. I

3. In an oil feed control for oil burners, a pump and means forregulating the iow of oil from the pump to the burner, of a reservoiradapted to receive the excess discharge from the pump, an oil passageconnected with the main supply and leading to the intake of the oilpump, a check valve in said passage adapted to close the inflow of oilto the pump, a passage connected with the passage to the pump andleading intol the reservoir, a valve adapted to close the passage fromthe reservoir to the pump and concurrently open the check valve andadapted to close the check valve upon being opened, a rocker memberpivoted intermediate of its length and pivotally connected to the valvewhich operates the check' valve,y a link pivotally connected to theother end of the rocker member, an arm carrying a float pivotallyconnected to said link, and a fixed pivot supporting said float arm,said float arm being adapted to swing said link either side of the deadcentre llne and to open the valve controlling communication between theoil pump and the reservoir.

4. An oil feed control for oil burners, comprising an oil pump,afreservoir connected with the inlet to the pump, a feed pipe lead` ingfrom an oil supply andconnected with the connection of the pump to thereservoir,

automatic valve controlled means for re lating the iioW of oil to thepump eit er from the reservoir or from the main supply, a chamberconnected With` the discharge from the pump, means for regulating theHOW of oil from said chamber to the oil burner, a spring loaded Valveadapted to release the surplus oil fed by the pump to said chamber, apipe leading from said spring loaded valve controlled exit, a drip oilfeed connected vto said pipe having an overflow leading to saidreservoir, a passage leading from the dripoil feed, an'air ductconnected with said drip oil feed passage,

and a pressure blower connected With said air duct and receivinglubrication from th oil fed through the drip feed. 5. An oil feedcontrol for oil burners, cornprising an oil pump, a reservoir connectedwith the inlet to the pump, a feed pipe leading from an oil supply andconnected with the connection of the pump to the reservoir,

and a passage open to the atmosphere, an

oilpassage communicating with the air passage, a duct leadin fromthefspring loaded overflow, and a drip outlet connected with said pipedirecting a regulated quantity of oil into, the passage communicatingWith the air passage and the remainder into the passage leading to theinterior of the reservoir.

ARTHUR P. HOLDEN.

PHILIP MORGAN.

SAMUEL ROLFE WILLIAMS.

